tóng-àn:C G-K - DSC 0421.jpg

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C_G-K_-_DSC_0421.jpg ‎（408 × 500 siōng-sò͘ , tóng-àn chiàm-liōng: 95 KB, MIME luī-hêng: image/jpeg）

Soat-bêng
English: Closeup front view of one antenna of the Allan Telescope Array, a radio telescope for combined radio astronomy and SETI (Search for Extraterrestrial Intelligence) research being built by the University of California at Berkeley, outside San Francisco. The first phase, consisting of 42 6 meter dish antennas like the one shown here, was completed in 2007. Eventually it will have 350 antennas. This type of antenna is called an offset Gregorian design. The incoming radio waves are reflected by the large parabolic dish onto a secondary concave parabolic reflector in front of the dish, and then into a feed horn. A metal shroud can be seen along the bottom of the secondary reflector which shields the antenna from ground noise. It covers the frequency range from 0.5 to 11.2 GHz.
Ji̍t-kî
Chhut-chhù https://www.flickr.com/photos/cgk/1558787110/
Chok-chiá Colby Gutierrez-Kraybill
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image/jpeg

校驗和 繁體中文

80561dfae39187a245481f88d17102b2d2aaddcb

斷定方法 繁體中文: SHA-1 中文 (已轉換拼寫)

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97,461 Byte

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408 ōe-sò͘

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Ji̍t-kî/Sî-kan細張圖寸尺Iōng-chiáChù-kái
hiān-chāi2010-nî 9-goe̍h 20-ji̍t (pài-it) 22:482010-nî 9-goe̍h 20-ji̍t (pài-it) 22:48版本的細圖408 × 500（95 KB）Noonehasthisnameithink{{Information |Description={{en|1=The Allen Telescope Array.}} |Source=http://www.flickr.com/photos/cgk/1558787110/ |Author=[http://www.flickr.com/people/69043449@N00 Colby Gutierrez-Kraybill] |Date=2007-10-11 |Permission={{cc-by-3.0}} |other_versions= }

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